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A boy whirls a small stone attached to a 1.5m string in a horizontal circle 2.0m above the ground. The string suddenly breaks and the stone flies off horizontally and lands 12m away.
What was the centripetal acceleration of the stone just before the string breaks?
Two masses are tied to a rope. The first mass is attached to a spring that is then attached to the ground. How much potential energy is stored in the spring
A playground merry-go-round of radius R = 1.20 m has a moment of inertia I = 260 kg · m2 and is rotating at 8.0 rev/min about a frictionless vertical axle, What is the new angular speed of the merry-go-round
How much would an 80.0kg person weigh) on mars where an acceleration of gravity is 3.93m/s^2 and (b) on earth's moon where the acceleration of gravity is 1.63m/s^2.
A dentist's drill starts from rest. After2.90s of constant angular acceleration it turns at a rate of2.2104rev/min. Find the drill's angular acceleration
Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.0919 N when their center-to-center separation is 52.3 cm. find the positive charge in coulombs on the other
How much friction must be exerted between the skates and ice.
A 2.31-kg bucket is attached to a disk-shaped pulley of radius 0.109 m and mass 0.801 kg. What is the angular acceleration of the pulley
Two people carry a heavy electric motor by placing it on a light board 2.70m long. One person lifts at one end with a force of 380N, Where is its center of gravity located
A certain atom of has 81 protons. Assume that the nucleus is a sphere with radius 6.99 fm, compute the magnitude of the electric field produced by the protons
q1. a small metal bead labelled a has a charge of 29 nc. it is touched to metal bead b initially neutral so that the
what is the coefficient of kinetic friction between the box and the tabletop.
we mixed up some unknown mass of ice at 0 C with 1 kg of steam at 100 C and soon established thermal equalibrium at 55 C what was the mass of ice
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